Whipple 2.9 Gas Mileage
Thread Starter
Joined: Jul 2011
Posts: 42
From: CA
Whipple 2.9 Gas Mileage
I have a 04 cobra and was thinking about putting on a 2.9 whipple. I was wondering if anyone knows how much the gas mileage will suffer and if it is hard to control. I am waiting to see if the gas prices might go down before I do anything.
3rd Gear Member
Joined: Mar 2008
Posts: 762
From: Alpharetta, Ga
Be ready for the flood of 'if you're worried about gas prices you should buy a Honda' messages that are to come. Some folks can't comprehend that even sports car owners can care about gas costs, and about mods that might impact mileage.
But there should be little difference with the whipple in normal driving. Of course when you floor it you will lose more, but in cruising I think it might even have a smidge less parasitic loss than the Eaton, so would be a smidge better on gas. But I admit that I don't know for sure. Just my semi-educated guess from my own reading and learning over the last few years.
But there should be little difference with the whipple in normal driving. Of course when you floor it you will lose more, but in cruising I think it might even have a smidge less parasitic loss than the Eaton, so would be a smidge better on gas. But I admit that I don't know for sure. Just my semi-educated guess from my own reading and learning over the last few years.
Thread Starter
Joined: Jul 2011
Posts: 42
From: CA
Funny thing is, is that I traded in my honda civic dx to get this car back in 2004. The price for gas way back then was $2.00 a gal didn't bother me one bit. But a $4.63 a gallon if the gas mileage really sucks with that on it I want to know about. I am just an ordinary guy, with an ordinary income not rich by any means no to mention the gas could go up to $7 or $8 a gal by summer.
Joined: Sep 2011
Posts: 18
From: MI
I don't have a 2.9 whipple but, I do have a 2.1 KB on my cobra with supporting mods. On the expressway I was able to get 20.8 mpg. This was driving very conservatively but, as soon as you want to have some fun and start laying into the pedal your gas milage is going to be horrible. As far as controlling it you can. However, its going to take some major self control and probably are just better off not getting it right now if your worried about the price of gas.
4th Gear Member
Joined: Jan 2008
Posts: 1,394
From: gahanna ohio
with my 2.3 whipple i got about 20 on the highway also...but like everyone says once you start hittin it you basically cut it in half...
uhh if your worried about control maybe you should drive one first lol...also be prepared for things to break when adding that much hp
uhh if your worried about control maybe you should drive one first lol...also be prepared for things to break when adding that much hp
Thread Starter
Joined: Jul 2011
Posts: 42
From: CA
I want to thank you for all the info. It's nice to know what I will be getting into before I do it. By the way what kind of things start breaking? I have got subrames installed and a heavy duty Mccleod clutch (800hp), findanza flywheel.
Last edited by snakelover73150; Mar 15, 2012 at 10:04 AM.
5th Gear Member
Joined: Nov 2007
Posts: 4,955
From: Maryland
Be ready for the flood of 'if you're worried about gas prices you should buy a Honda' messages that are to come. Some folks can't comprehend that even sports car owners can care about gas costs, and about mods that might impact mileage.
But there should be little difference with the whipple in normal driving. Of course when you floor it you will lose more, but in cruising I think it might even have a smidge less parasitic loss than the Eaton, so would be a smidge better on gas. But I admit that I don't know for sure. Just my semi-educated guess from my own reading and learning over the last few years.
But there should be little difference with the whipple in normal driving. Of course when you floor it you will lose more, but in cruising I think it might even have a smidge less parasitic loss than the Eaton, so would be a smidge better on gas. But I admit that I don't know for sure. Just my semi-educated guess from my own reading and learning over the last few years.
2nd Gear Member
Joined: May 2011
Posts: 223
From: IL
Someone correct me if I am wrong, but aren't the twin screw blowers much more efficient than the stock roots blower due to the internal compression (the compression between the rotors) of twin screws which creates an easier boost and quicker delivery to the engine?
I like learning about this stuff
I like learning about this stuff
4th Gear Member
Joined: Jan 2008
Posts: 1,394
From: gahanna ohio
yes more effiecent but it lets you add more fuel safely thus making more power...your limited with the eaton...but that goes back to the part if your gonna mash on it your gonna pay for it...
as far as breaking and upgrades needed...you need a whole fuel system to support it or a KB BAP...a nice twin disk clutch would be great but if your gonna have some stickies on then youll start snapping things like input shaft output shaft and possible axles depending on power and how hard you can launch it
as far as breaking and upgrades needed...you need a whole fuel system to support it or a KB BAP...a nice twin disk clutch would be great but if your gonna have some stickies on then youll start snapping things like input shaft output shaft and possible axles depending on power and how hard you can launch it